KR101844869B1

KR101844869B1 - Mounting type noiseproof panel and noiseproof concrete structure

Info

Publication number: KR101844869B1
Application number: KR1020150188083A
Authority: KR
Inventors: 김태진
Original assignee: 김태진
Priority date: 2015-12-29
Filing date: 2015-12-29
Publication date: 2018-05-18
Also published as: KR20170078008A

Abstract

An object of the present invention is to provide an attachable sound-absorbing sound insulation panel for reducing reflections of a retaining wall and a concrete structure. A sound absorbing material 20 built in the frame 10 to absorb noise; And a piercing plate 30 provided in the frame 10 and blocking the sound absorbing material 20. A bracket 12 is provided at the rear of the frame 10 and a bolt hole The anchor bolts 4 inserted into the bolt hole 13 are anchored to the soundproof panel attachment to fix the frame 10, And a frame insertion piece 34 protruding from the back surface is provided in the perforated plate 30 so that the frame insert piece 34 is inserted into the perforated plate engaging groove 15 of the frame 10 .

Description

Technical Field [0001] The present invention relates to a sound absorbing and soundproof panel for reducing reflections of a retaining wall and a concrete structure,

The present invention relates to an adhesive-type sound-absorbing and soundproof panel and a sound-absorbing and soundproofing panel concrete structure for reducing reflections of retaining walls and concrete structures, and more particularly to a sound absorbing and soundproofing panel structure capable of reducing reflections from retaining walls and concrete structures installed at places such as roads and tunnels. And a sound absorbing and soundproof panel concrete structure using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a sound absorbing and soundproofing panel for reducing reflections of a new retaining wall and a concrete structure.

In general, the development of industry has caused various pollutants to destroy the natural environment. In addition, it has produced various sounds and caused a new pollution called noise. Especially, in order to increase the space utilization, the downtown area where various buildings are concentrated is subjected to the noise of a number of passing vehicles from the roads constructed between the buildings. Therefore, soundproof walls are installed along the roads to improve the living environment.

Meanwhile, the retaining wall can be installed along the edge of a place where a noise source such as a highway exists. By blocking various noise generated in a running vehicle from being transmitted to a nearby residential area, a separate sound absorbing material A structure having a built-in antenna is required.

Traffic noise reflected from the entrance of the tunnel and the retaining wall of the sunken has caused noise pollution to residents of the roadside apartment building and is often subject to complaints. Actually, the amount of noise reflected from the retaining wall is estimated as follows.

It is assumed that the width of the four-lane tunnel is about 20m, the vehicle runs about 1.5m from the retaining wall, and the apartment house is 40m away from the end of the road. At this time, if the noise source is a large vehicle, it will be 1m above the ground, 0.5m above the ground if it is a small vehicle, and 2m above the retaining wall. 1 is a schematic view showing a driveway, a retaining wall, a noise source, and a location of a house.

The material of the retaining wall mainly uses rough concrete, and the sound absorption rate and NRC of the rough concrete are as shown in FIG.

The noise level of the traffic noise propagated through path A directly propagated in FIG. 1 and path B reflected by rough concrete (NRC 0.03) is calculated as follows.

Noise due to propagation noise of path A: SPLA

SPLA = SPL0 - 20log68 + 10log0.97 = SPL0 - 36.7 dB (A)

Noise due to path B radio noise: SPLB

SPLB = SPL0 - 20log65 = SPL0 - 36.2 dB (A)

Noise level of sound receiving point: SPL

SPL0 = 33.4 dB (A) SPL = SPLA + SPLB = (SPL0-36.7) + (SPL0-36.2)

Noise increase due to reflection sound: ΔSPL

? SPL = SPL - SPLB = 2.8 dB

In other words, the traffic noise is reflected from the retaining wall in the case of the apartment adjacent to the roadside, so the noise level is increased by about 2.8 dB at the receiving point.

Therefore, a countermeasure against the traffic noise reflected from the retaining wall is needed. There are various measures that can be taken into consideration in order to prevent the traffic noise reflected from the retaining wall from increasing the noise level at the sound receiving point, but it is most desirable to sufficiently increase the sound absorption rate of the reflection point.

Among the existing retaining walls, the concrete is roughened to increase the sound absorption rate and to induce diffuse reflection, thereby lowering the noise level, but the effect is not reaching a meaningful level.

As can be seen from the table above, even when the surface is roughened, the sound absorption rate hardly increases. In addition, the traffic noise is similar to the sound source in the near field, so the surface roughness of the reflector is not considered in soundproofing design. It is desirable to provide a sound absorbing panel having a high sound absorption rate because the rough concrete which is currently widely used has a small noise reducing effect.

Domestic registered patent No. 10-0519912 (Registered on September 30, 2005) Korean Registered Patent No. 10-0721121 (registered on May 16, 2007) Korean Patent Laid-Open No. 10-2014-0028290 (published on April 10, 2014)

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems, and an object of the present invention is to provide a method for reducing the reflection sound in a retaining wall or a concrete structure installed at a place such as a roadside or a tunnel entrance, A sound absorbing and soundproofing panel for reducing reflection sound of a concrete structure, and a sound absorbing and soundproofing panel concrete structure using the same.

According to an aspect of the present invention, A sound absorbing material embedded in the frame to absorb noise; And an anchor bolt hole is formed in the bracket, and the anchor bolt inserted into the anchor bolt hole is inserted into the soundproof panel attachment, And the frame is fixed to the frame. An adhesive type sound-absorbing sound insulation panel for reducing reflections of a retaining wall and a concrete structure is provided.

And a frame-shaped cover having an opening communicated with the front and rear surfaces is coupled to the front surface of the frame, so that the cover prevents a portion of the periphery of the perforated plate from being separated from the frame.

Further, according to the present invention, there is provided a sound insulation panel installation adjacent to a road side; And a sound absorption sound insulation panel mounted on the surface of the sound insulation panel attachment, wherein the sound absorption sound insulation panel comprises: a frame; A sound absorbing material embedded in the frame to absorb noise; A perforated plate provided on the frame to block the sound absorbing material; And a cover fixed to the front surface of the frame to cover the peripheries of the perforated plate. The sound absorbing and soundproofing concrete structure for reducing reflected sound is provided.

In the present invention, a sound-absorbing soundproof panel is installed on a retaining wall or other concrete structure installed adjacent to a road to reduce noise caused by a reflected sound reflected from a retaining wall, thereby preventing noise pollution from residents of a roadside apartment house, It is also effective to prevent cases where complaints are often caused by pollution.

Of course, the present invention has various effects in addition to the above effects, but the above-described effects are considered to be the main effects of the present invention.

1 is a view conceptually showing a process in which noise is reflected in a retaining wall adjacent to a road;
2 is a view showing the sound absorption rate and NRC of the rough concrete shown in Fig.
3 is a front view of a main part of a frame of an attachable sound-absorbing sound insulation panel for reducing reflections of a retaining wall and a concrete structure according to the present invention.
4 is a side sectional view showing the structure of the sound-absorbing sound insulation panel according to the present invention
Fig. 5 is a partially enlarged side sectional view of the sound-absorbing and soundproof panel of Fig.
6 is a plan view showing the structure of a sound-absorbing and soundproof panel according to the present invention
7 is an exploded perspective view of a sound-absorbing sound insulation panel according to the present invention
8 is an external perspective view of a sound-absorbing and soundproof panel according to the present invention.
9 is a side sectional view schematically showing a process of forming a sound-absorbing and soundproofing panel concrete structure by being installed on a retaining wall of the sound-absorbing and soundproofing panel of the present invention
10 is an exploded perspective view of a sound-and-soundproof panel according to another embodiment of the present invention
11 is a rear view of a frame which is a main part of a sound-absorbing sound insulation panel according to another embodiment of the present invention
12 is a side cross-sectional view schematically showing a process of installing a sound-and-soundproof panel according to another embodiment of the present invention shown in FIG. 11 on a retaining wall
13 is a view conceptually showing a noise reduction state by the sound-absorbing sound insulation panel of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. For example, if a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, It is to be understood that other components may be "connected "," coupled "

Referring to the drawings, an attachable sound-absorbing sound insulation panel for reducing reflection sound of a retaining wall and a concrete structure according to the present invention includes a sound absorbing material 20 built in a frame 10 and a perforated plate 30 provided in front of a sound absorbing material 20 And the perforated plate 30 is supported to be engaged with the frame 10 by the cover 40. The sound-absorbing sound-proofing panel of the present invention is attached to the surface of the sound-insulating panel attachment. In the present invention, the sound insulation panel attachment is mainly a retaining wall (2). The sound-absorbing panel according to the present invention is attached to the retaining wall 2 to reduce the noise source reflected from the retaining wall 2. The sound- .

The frame 10 has a frame shape with a space inside. In the present invention, the frame 10 is formed in a rectangular frame shape. The inner space portion of the frame 10 is a space portion in which the sound absorbing material 20 is embedded. A bracket 12 is provided at the rear of the frame 10 and a bolt hole 13 is formed in the bracket 12. A plurality of brackets (12) are provided on the rear side of the frame (10) in the up, down, left and right directions. Accordingly, the anchor bolts 4 inserted in the bolt holes 13 are anchored to the soundproof panel attachment to fix the frame 10. An anchor bolt (4) is inserted into an anchoring hole of a sound-absorbing panel attachment in a bolt hole (13) provided in a bracket (12) of the frame (10) The frame 10 can be attached to the surface of the sound-absorbing panel attachment by being fixed to the sound-absorbing panel attachment by the grouting material in the anchoring hole.

A piercing plate coupling groove (15) is provided on the front surface of the frame (10). The perforated plate engaging groove 15 is also formed in a rectangular shape when viewed from the front face of the frame 10. [ Further, the frame 10 is provided on the front surface thereof with an outer concave groove 17 so as to be disposed around the perforated plate engaging groove 15. The outer concave grooves 17 are provided at positions outside the perforated plate engaging grooves 15 of the frame 10. The outer concave groove 17 also has a rectangular shape when viewed from the front side of the frame 10.

The sound absorbing material 20 is embedded in the inner space of the frame 10. Any material that can absorb noise can be used as a blemish. At this time, in the present invention, the sound absorbing material 20 may be constructed by stacking a plurality of sound absorbing sheets having a plurality of protruded sound absorbing embossing portions and a sound absorbing space S secured between the respective sound absorbing and demolding portions. When the sound absorbing space S and the sound absorbing space S are ensured in the sound absorbing material 20, noise is more reliably absorbed in the sound absorbing material 20 through the process of passing the sound between the sound absorbing spaces S, . And the sound absorbing space (S) is provided to further improve the noise reduction efficiency.

The perforated plate 30 is provided on the frame 10 to block the sound absorbing material 20 from the front. The perforated plate 30 has a plurality of blemished holes communicating with the front and rear surfaces. The sound-absorbing hole 32 may be composed of a plurality of elongated holes and a plurality of circular holes formed laterally when viewed from the front. The sound-absorbing hole 32 may be composed of only a plurality of circular holes. At this time, the perforated plate 30 is provided with a frame insertion piece 34 protruding from the back surface. And a rim insertion piece 34 is provided to protrude from the periphery of the perforated plate 30 to the rear surface. The frame insertion piece 34 is projected in a direction orthogonal to the surface of the perforated plate 30. The edge insert piece 34 of the perforated plate 30 is inserted into the perforated plate engaging groove 15 of the frame 10 so that the perforated plate 30 blocks the sound absorbing plate in front. At this time, an outer concave groove 17 is provided on the front surface of the frame 10 so as to be disposed around the perforated plate engaging groove 15, so that the frame engaging piece 34 of the perforated plate 30 is positioned on the front surface of the frame 10 The outer concave grooves 17 are secured to the peripheries of the perforated plates 30 in a state of being inserted into the perforated plate engaging grooves 15. The frame 10 is secured with a space S of a certain width around the perforated plate 30 by the outer concave grooves 17.

A frame 40 having an opening communicated with the front and back surfaces is coupled to the front surface of the frame 10 so that the cover 40 covers a part of the periphery of the perforated plate 30, . The cover 40 is formed in a frame shape having an opening communicating with the front and rear surfaces on the inside. The frame 10 is formed in a square shape, so that the cover 40 is also formed in a rectangular frame shape. The cover 40 is fastened to the front surface of the frame 10 by a fixing means such as a bolt and blocks the front edge of the perforated plate 30 by a predetermined width. So that the frame 10 is prevented from moving forward.

According to the present invention, a sound-absorbing and soundproof concrete structure for reducing reflected sound is provided by attaching the sound-absorbing sound-absorbing panel to the surface of the sound-absorbing panel attachment. The sound-absorbing and soundproof concrete structure for reducing the reflections of the present invention includes a sound-absorbing panel attachment disposed adjacent to the road, and a sound-absorbing sound-absorbing panel mounted on the surface of the sound-absorbing panel attachment. The sound-absorbing sound-insulating panel has the above-described structure. In the present invention, the sound-absorbing sound-insulating panel is attached to the surface of the retaining wall 2, which is installed mainly on the road side. That is, the soundproof panel attachment is a retaining wall (2), and a sound absorbing soundproof panel is provided on the surface of the retaining wall (2).

Hereinafter, a process of attaching the sound-absorbing and soundproof panel according to the present invention to the retaining wall 2 will be described.

First, the frame 10 is attached to the surface of the retaining wall 2 by the anchor bolts 4. The anchor bolts 4 inserted into the bolt holes 13 of the bracket 12 provided at the rear of the frame 10 are anchored to the inside of the retaining wall 2 to attach the frame 10 to the surface of the retaining wall 2 .

And the sound absorbing material 20 is embedded in the inner space of the frame 10.

After the sound absorbing material 20 is embedded in the frame 10, the perforated plate 30 is mounted on the front surface of the frame 10. A perforated plate coupling groove 15 is formed on the front surface of the frame 10 projecting backward from the back surface of the perforated plate 30 and a frame insert piece 34 protruding from the back surface of the perforated plate 30 is provided , And the rim insertion piece (34) is inserted into the piercing plate coupling groove (15) formed on the front surface of the frame (10). So that the perforated plate 30 covers the sound absorbing member 20 in a state where the perforated plate 30 is engaged with the frame 10. At this time, an outer concave groove 17 is provided on the front surface of the frame 10 so as to be disposed around the perforated plate engaging groove 15, and the frame insert piece 34 of the perforated plate 30 is inserted into the perforated plate engaging groove 15, The outer circumferential concave groove 17 is secured to the periphery of the perforated plate 30. As shown in Fig.

Next, a frame-shaped cover 40 is coupled to the front surface of the frame 10. The cover 40 can be coupled to the front surface of the frame 10 by a fixing means such as a bolt. The cover 40 coupled to the front surface of the frame 10 prevents a part of the periphery of the pier plate 30 from being separated from the frame 10 and prevents the sound absorbing material 20 from being separated by the pier plate 30, So that it can be stably prevented.

The sound-absorbing and soundproof panel can be selected as the first, second, and third layers and attached to the surface of the retaining wall 2 corresponding to the height of the retaining wall 2.

By attaching the sound-absorbing sound-proofing panel to the retaining wall 2 as described above, a sound-absorbing sound-retaining wall 2 for reducing reflected sound can be provided. Of course, it is of course possible to provide a sound absorbing and soundproofing concrete structure for reducing other reflections in addition to the retaining wall 2 in the present invention.

The present invention having the above-described structure is different from the conventional one in which a sound-absorbing soundproofing panel can not be installed in facilities around the retaining wall 2 adjacent to the road, and a sound-absorbing soundproofing panel is installed in the retaining wall 2 or other concrete structure This reduces the noise caused by the reflected sound reflected from the retaining wall 2, thereby preventing noise pollution to the residents of the roadside apartment house. It is also possible to prevent the noise from being generated by the reflection sound from the retaining wall 2 The main effect is to prevent the occurrence of complaints by preventing the noise from being caused by the noise that is generated during the passage.

It is the most economical and effective way to sufficiently increase the sound absorption rate of reflection points where noise is reflected, such as retaining walls (2) or other concrete structures installed around roads. The present invention is characterized in that the retaining wall (2) around the road has the most economical and effective increase of the absorption rate of the reflection point by the other concrete structure. The retaining wall 2 provided with the sound-absorbing reflective panel according to the present invention will now be described with reference to the drawings.

(A) When a sound absorbing plate having a sound absorption coefficient (NRC) of 0.7 is installed on the surface of the retaining wall 2

Noise due to propagation noise of path A: SPLA

SPLA = SPL0 - 20log68 + 10log0.3 = SPL0 - 41.8 dB (A)

The noise level due to the path B radio noise is the same

Noise level of sound receiving point: SPL

SPL = - SPLB = (SPL0 - 41.8) + (SPL0 - 36.2) = SPL0 - 35.1 dB (A)

When a sound absorbing panel having a sound absorbing ratio (NRC) of 0.7 is installed on the surface of the retaining wall (2), the noise level of the sound receiving point is reduced by 1.7 dB from the pre-installation level.

(B) When a sound absorbing plate having a sound absorption coefficient (NRC) of 0.8 is installed on the surface of the retaining wall 2

Noise due to propagation noise of path A: SPLA

SPLA = SPL0 - 20log68 + 10log0.2 = SPL0 - 43.6 dB (A)

Noise level of sound receiving point: SPL

SPL = - SPLB = (SPL0 - 43.6) + (SPL0 - 36.2) = SPL0 - 35.5 dB (A)

When a sound absorbing plate with a sound absorbing ratio (NRC) of 0.8 is installed on the surface of the wall, the noise level of the sound receiving site is reduced by 2.1 dB from the pre-installation level.

(C) When a sound absorbing plate having a sound absorption ratio (NRC) of 0.9 is installed on the surface of the retaining wall 2

Noise due to propagation noise of path A: SPLA

SPLA = SPL0 - 20log68 + 10log0.1 = SPL0 - 46.6 dB (A)

Noise level of sound receiving point: SPL

SPL = SPLA + SPLB = (SPL0 - 46.6) + (SPL0 - 36.2) = SPL0 - 35.8 dB (A)

When a sound absorbing plate having a sound absorbing ratio (NRC) of 0.9 is installed on the surface of the retaining wall (2), the noise level of the sound receiving point is reduced by 2.4 dB.

As a result, the traffic noise reflected from the entrance of the tunnel and the retaining wall 2 of the sunken can cause a noise increase of about 2.8 dB for the residents of the roadside apartment house. In order to prevent this, increasing the sound absorption rate of the reflection surface is an economical and effective method to be.

As in the present invention, when a sound absorbing plate having a sound absorption coefficient (NRC) of 0.7 or more is appropriately installed, the noise level at the sound receiving point can be reduced by about 2 dB.

In the present invention, a bracket 12 is provided at the rear of the frame 10, a bolt hole 13 is formed in the bracket 12, and anchor bolts 4 inserted in the bolt holes 13 It is easy to install the sound-absorbing sound insulation panel of the present invention on the retaining wall 2 or the like because the frame 10 is anchored to the sound-absorbing panel attachment.

The frame 10 is provided with a piercing plate engaging groove 15 and the piercing plate 30 is provided with a frame insertion piece 34 protruding from the back face thereof so that the frame insertion piece 34 is inserted into the frame 10 is inserted into the front piercing plate engaging groove 15 so that the piercing plate 30 can be fastened to the frame 10 quickly and easily.

Particularly, a front surface of the frame 10 is provided with an outer concave groove 17 so as to be disposed around the perforated plate engaging groove 15, and the outer concave groove 17 is formed in the periphery of the perforated plate 30 The operator can secure the margin space S and secure the margin secured by the outer concave groove 17 when the edge fitting piece 34 of the perforated plate 30 is fitted into the perforated plate engaging groove 15 of the frame 10. [ It is possible to easily insert the perforated plate 30 into the frame 10 and to secure the perforated plate 30 to the frame 10 The piercing plate 30 is pulled back from the frame 10 by putting the hand into the clearance space S secured by the outer concave groove 17 and pulling the piercing plate 30 backward. It is also easier to separate.

A frame 40 having an opening communicated with the front and rear surfaces is coupled to the front surface of the frame 10 so that the cover 40 covers a part of the periphery of the perforated plate 30, The cover 40 can be securely fixed to the frame 10 when the pier plate 30 is installed and the cover 40 can be fixed to the frame 10 when the pier plate 30 is lifted from the frame 10 or the sound- It is convenient to replace the perforated plate 30 and replace the sound-absorbing plate.

According to another embodiment of the present invention, the frame 10 includes a back plate 114, and the back plate 114 is provided with a plurality of hanger holes 112, Diameter hanger hole 112A and a large-diameter hanger hole 112B.

In another embodiment of the present invention, the anchor bolts 4 anchored to the retaining wall 2 (which may be the anchor bolts 4 anchored to concrete structures other than the retaining wall 2 in addition to the retaining wall 2) Diameter hanger hole 112B of the hanging hole 112 to advance the frame 10 forward and then the frame 10 is lowered downward by aligning the large-diameter hanging hole 112B of the hanging hole 112 (or the nut coupled to the anchor bolt 4) Diameter hanger hole 112A is coupled to the anchor bolt 4 so that the small diameter hanger hole 112A is engaged with the head portion 4a of the anchor bolt 4 (or the nut coupled to the anchor bolt 4) The sound absorbing and soundproofing panel of the present invention can be more quickly and conveniently connected to the retaining wall 2 or the like by the anchor bolts 4. [ When the sound absorbing sound insulation panel of the present invention is to be removed from the retaining wall 2 or the like and the sound absorbing sound insulation panel is held up by the anchor bolt 4 as a reference, the large diameter hanger hole 112B is pressed against the anchor bolt 4 Diameter hanging hole 112B is not caught by the head portion 4a of the anchor bolt 4 when the sound-absorbing sound-proofing panel is pulled back in this state so that the sound-absorbing sound-absorbing panel can be easily attached to the retaining wall 2 ) And the like.

Meanwhile, the functions and effects of the other embodiments of the present invention are similar to those of the above-described embodiments, and a duplicate description thereof will be omitted.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

2. Retaining wall 4. Anchor bolt
10. Frame 15. Perforated plate coupling groove
17. Outer concave groove 20. Sound absorbing material
30. Perforated plate 32. Sound absorbing hole
34. Border insertion piece 40. Cover
112. Hanger hole 112A. Small diameter hanger hole
112B. Small diameter hanger hole 114. Back plate

Claims

A frame 10;
A sound absorbing material 20 built in the frame 10 to absorb noise;
And a piercing plate (30) provided on the frame (10) for blocking the sound absorbing material (20)
A bracket 12 is provided at the rear of the frame 10 and a bolt hole 13 is formed in the bracket 12 so that the anchor bolt 4 inserted in the bolt hole 13 is inserted into the sound- Anchored to secure the frame (10)
The frame 10 is provided with a perforated plate engaging groove 15 and the perforated plate 30 is provided with a frame insert piece 34 protruding from the back face thereof and the frame insert piece 34 is inserted into the perforated plate 30 In a direction orthogonal to the surface of the substrate,
The edge fitting member 34 of the pier plate 30 is inserted into the pier plate engaging groove 15 so that the sound absorbing member 20 is prevented from being held in the state where the pier plate 30 is engaged with the frame 10 give,
An outer concave groove 17 is secured in the periphery of the perforated plate 30,
A frame 40 having an opening communicated with front and rear surfaces is coupled to the front surface of the frame 10 so that the cover 40 covers a part of the periphery of the perforated plate 30, Wherein the sound absorbing panel is configured to prevent detachment of the sound absorbing panel from the retaining wall and the concrete structure.

delete

The method according to claim 1,
The frame 10 is provided with a back plate and a plurality of hanger holes 112 are formed on the back plate and the hanger holes 112 are formed in the small diameter hanger holes 112A and the large diameter hanger holes 112B Wherein the sound absorbing panel is a sound absorbing panel for reducing reflection sound of a retaining wall and a concrete structure.

A soundproof panel attachment adjacent to the road side;
And a sound absorption sound insulation panel mounted on the surface of the sound insulation panel attachment,
The sound-
A frame 10;
A sound absorbing material 20 built in the frame 10 to absorb noise;
A perforated plate 30 provided on the frame 10 and blocking the sound absorbing material 20;
And a cover (40) fixed to the front surface of the frame (10) so as to cover the periphery of the perforated plate (30)
A bracket 12 is provided at the rear of the frame 10 and a bolt hole 13 is formed in the bracket 12 so that the anchor bolt 4 inserted into the bolt hole 13 is inserted into the sound- To secure the frame (10)
The frame 10 is provided with a piercing plate engaging groove 15 and the piercing plate 30 is provided with a frame insertion piece 34 protruding from the back surface thereof and the frame insertion piece 34 is inserted into the pier plate 30 In a direction orthogonal to the surface of the substrate,
The edge fitting member 34 of the pier plate 30 is inserted into the pier plate engaging groove 15 so that the sound absorbing member 20 is prevented from being stuck in the state where the pier plate 30 is engaged with the frame 10 give,
The frame 10 is provided with an outer concave groove 17 so as to be disposed around the perforated plate engaging groove 15,
A frame 40 having an opening communicated with front and rear surfaces is coupled to the front surface of the frame 10 so that the cover 40 covers a part of the periphery of the perforated plate 30, Of the sound absorbing concrete structure.

delete

8. The method of claim 7,
Wherein the soundproof panel attachment is a retaining wall (2), and the sound absorbing and soundproofing panel is installed on the surface of the retaining wall (2).